Smoke filling up a room is indeed an example of diffusion. Diffusion occurs when two or more sets of molecules intermingle and spread out. In this case, it would be the smoke molecules interacting and spreading out among the air molecules.
I think it is A because I have this question before and I know it already.
Hello did u find out the answer if so can you please help
Answer: she was as pretty as daffodils
Explanation: